Chain pin injector and ejector tool



Nov. 14, 1944. H. c. MEDLEY CHAIN PIN INJECTOR AND EJECTOR TOOL Filed Ocfa. 15, 1945 .Y m C.

Patented Nov. 14, 1944 7 CHAIN rm mmo'ron mnnmo'ron Tool.

Harold C. Medley, Columbus, Ohio, assignor .to The Jeflrey Manufacturing Company, a corporation of Ohio Application October 15, lllfi serial No. 506,458

This invention relates to a tool which is designed particularly 'to inject or eject a pin ot'a link type chain.

An object of the invention therefore is to provide an improved tool of the above-mentioned type which can readily inject a pin into a chain.

Another object of the invention isito provide such an improved tool for ejecting a pin from a chain. 1

A further objector the invention is to provide to such a tool which can alternatelyinject or elect a chain pin.

A still further object of the invention is'to provide such a tool in which the pin is guided so as to have a predetermined position with'respect to the chain link when inserted.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

In the accompanying drawing,

Fig. 1 is a developed view of the tool of my invention; 7

Fig. 2 is a sectional elevational view of the tool shown in operating position with respect to a chain and showing the manner of inserting a chain pin in place;

Fig. 3 is a partial view, similar to Fig. 2,, showing the manner of ejecting a pin;

Fig. 4 is a sectional viewtaken on the line 4--4 of Fig. 2, looking in the direction of the arrows; and

Fig. 5 is a sectional view taken on the line 55 of Fig. 2, looking in the direction of the arrows.

The tool of my invention is constructed particularly to inject or eject relatively large connecting or pivot pins which are used in fairly heavy chains and which, at least in part, have a tight fit with a portion of a chain link so as to require a special tool for ejection.

The tool includes a threaded block or head In which at its center threadedly receives a threaded shaft or screw H provided with a tool receiving head l2. At opposite sides the block or head 5 As illustrated in Figs. 2 and 3 of the drawing, a so adjacent their bottoms the links or tension means M, l5 carry a cross-head or base lfi," the opposite ends of which extend into the loops oi the links H and i5 and rest upon the bottom por- 10 Claims; (01.59-7) a l attached thereto by spring clips H which are attached to the base fl! by screws. 1 Attached to the bottom of the threaded shaft or screw H is a sliding "thrust-block 18, the op posite sides of which are notched to receive the spaced members of the links l4 and I5 which co- "operate to hold the block l8 against rotation as the screw II is rotated. The conection' between the screw I"! and the block l8 is'by means of a hushed pivot pin l9 which provides for free relativerotation between the two. The lower face of the thrust block 18 is provided with an integral cup 20 which is adapted to receive the head 2| of a pin .22 which is adaptedto attach two links of a chain together. i The two links of the chain are illustrated and include a pair of similar links, each having a pair of side bars 23 which are spaced apart at one end sufl'lciently'to extend over the "side" bars and integral'knuckle 24- formed at the other end of each link. The knuckle 24 may be providedwith abushing 25 as illustrated in the drawing' i In some chain constructions and in one in which the tool of my invention may be-employed. it isnecessary to have the pin 22 properly aligned in the side bars 23 and bushing 25 because the lower end of the pin, as illustrated in'Figs. 2

and a of the drawing, is provided with .final pin locking grooves 26 on opposite sides thereof which are received by alocking washer having .a keyhole. opening therein which is first pressed over the pin end and then slid longitudinally to To provide this alig nrnent the. head of the pin 22 is preferably provided with a projection 21 see Figs. Zand 3) which extends radially across the head and at its opposite ends is adapted to he received in diametrically spaced recesses 28 (see Fig 5), formed on opposite sides of a central recess 29 formed in the thrust block l8,

which recess 29 receives the head of the pin I9 which connects screw II and block 18. Thus by inserting the pin 22 in such a position that .wthe projection 21 is received in the two recesses 2B, theoperator canbe, assured that the pin 22 when pressed with a tight fitbetween the upper tions thereof and are removably and pivotally end thereof and thetopside bar'23, will be in proper position to be attached by the abovementioned keyhole washer.

To provide for the driving insertion of the pin 22 into the overlapping side bars 23 of two adjacent links, I provide a sliding ring 30 which is attached to some element of the tool by a flexible attaching device and, as illustrated, is attached to the link by a chain 3|, the chain preferably being welded to said link l5 and to one side of the slide ring 30. The chain 3| also extends to the previously mentioned base or crosshead I6 and is welded to it since otherwise the base I6 might be detachable from both of the links l4 and I5 since each of the spring clips provides for this detachability.

The slide ring 30 preferably has interlocking connections 32 adjacent each side which provide for and require it to be slid over the base l5 when inserted and removed, and adjacent each side of said ring 30 there is a spring clip 33 which is attached thereto by screws and which have frictional engagement with opposite-curved side portions of the base I6 to hold it in proper position and to indicate to an operator when it is properly pin 22 has been dropped in place to the position indicated which can be done without any tools since the chain parts can be freely assembled to the position indicated. The pin 22 is adjusted to such a position that the projection 21 will align with and be received by the recesses 28 as the threaded shaft II is operated by a tool on the head |2 to move the thrust block l8 downwardly until the head 2| of the pin is received in the integral cup 20.

As the threaded shaft II is screwed home, the pin 22 will be forced downwardly and there will be a tight fit. between the top portion thereof and the upper side bar 23. The pin 22 is, of course, free to move downwardly because of the slide ring 30 which transmits the compression force from the lower side bar 23 to the crosshead or base l6. At the'upper end'the compression force transmitted by the screw II is delivered by the thrust block I8 to the head 2| of the pin 22. The links M and I5 are, of course,

under tension. The threadedshaft II is turned until the head 2| of pin 22 rests against the top side bar 23, whereupon the threaded 'shaft II is operated in a reverse direction to lift the thrust block l8 from the head 2|, whereupon the 36 which will freely pass over the head 2| of the pin 22 and it is preferably permanently attached to the block or head II! or some other part of the tool by a flexible attaching device such as the chain 31 which is welded at one end to the ring 35 and at the other end to' said head l0.

To eject the pin 22 (see Fig. 3) the ring 35 is inserted over the head 2|, of said pin 22 and between the upper side bar 23 of the chain link and the thrust block I8. During this operation the sliding ring 30 is removed and the bottom of the pin 22 rests in a recess 38 formed in the center of the base Is. As the screw H is driven home and the links l4 and I5 are placed under tension, the force of the screw II will be transmitted to push downwardly on the chain links,

the force being transmitted from thrust block I8 tool can be readily disassembled as by detaching one of the links M or l5 from the base 5.

To provide for the ejection of a pin by the tool, there is another ring 35, though it is to be.

understood that within the scope of my invention there may be a single ring instead of the two rings 30 and 35, which may be employed alternately for injecting or ejecting a pin, depending upon whether it is positioned adjacent the upper side bar or lower side bar. Since the size of the openings in the two rings 30 and 35 is different, however, and since it is desired to provide friction guide means for the bottom ring, I preferably provide the tool with both the rings 30 and 35. The ring 35 is provided with a hole" through ring 35 to upper side bar '23 of a chain link. This, of course, will force the pin 22 upwardly with respect to the chain link and free the pin as soon as the tight fitting upper portion thereof is pushed out of the upper side bar 23. Thereafter the parts can be disassembled by disconnecting one of the links I4 or I5 from the basel6.

From the above description it is obvious that I have provided a, very flexible tool which can be used either to inject or eject a pin of a chain and one in which the pin will be guided into proper position when it is being injected.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without'departing from the spirit and scope of the invention as defined by the claims hereto appended, and I therefore wish not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I wish to secure by Letters Patent of the United States is:

l. A chain tool including a head and a spaced base, spaced link tension means connecting said head and base, a shaft threaded through said head. a block attached to said shaft to provide relative rotation therewith and adapted to transmit force from said shaft to a chain pin, and ring means adapted to rest on said base and against a chain link and. having an opening through which the chain pin can extend as it is forced in place by the clamping action of said threaded shaft.

2. A chain tool including a head and a spaced base, spaced tension means connecting said head and base, a shaft threaded through said head, a block having a cup for receiving a pin head and attached to said shaft and adapted to transmit force from said shaft to a chain pin, and means adapted to rest on said base and against a chain link and having an opening through which the .chain pin can. extend as it is forced in place by the clamping action of said threaded shaft.

I 3. A chain toolincluding a head and a spaced base, spaced link tension means connecting said head and base, a shaft threaded through said head, a block loosely connected to said shaft and adapted totransmit force from said shaft to a chain part, and ring means adapted to rest on said block and against a chain link and having an opening through which the chain pin can extend as it is forced out of place by the clamping action vof said threaded shaft.

4. A chain tool including a head and a spaced base, spaced tension means connecting said head .and base, a shaft threaded through said head, a block adapted to transmit force from said shaft to a chain part, and means adapted to rest on said block and against a chain link and having an opening through which the chain pin can extend as it is forced out of place by the clamping action of said threaded shaft.

5. A chain tool including a block and a spaced cross-head, spaced tension means pivoted at opposite ends to said block and cross-head providing space for a chain to extend between them, a shaft threaded through said block, a thrust block positioned between said tension means and adapted to receive the thrust of said threaded shaft and transmit it selectively to a chain pin or a chain side bar, a ring adapted to be inserted between said thrust block and a side bar and to transmit force between them when a chain pin is being removed, and a second ring adapted to be inserted between another side bar of said pin and said crosshead when a chain pin is being, inserted.

6. A chain tool including a block and a spaced cross-head, spaced tension means attached at opposite ends to said block and cross-head providing space for a chain to extend between them, a shaft threaded through said block, a thrust block positioned between said tension means and adapted to receive the thrust of said threaded shaft and transmit it selectively to a chain pin or a chain side bar, a ring adapted to be inserted between said thrust block and a side bar and to transmit force between them when a chain pin is being removed, and a second ring adapted to be inserted between another side bar of said pin and said cross-head when a chain pin is being inserted.

'l. A chain tool including a head, a shaft threaded through said head, a thrust block attached to said threaded shaft, tension means pivotally attached to opposite sides of said head, a base pivotally attached to one of said tension means and having means for pivotally attaching it to the other tension means, and an operating force transmitting ring attached by a flexible member to one of the aforedescribed elements.

8. A chain tool including a head, a shaft threaded "through said head, a thrust block attached to said threaded shaft, tension links pivotally attached to opposite sides of said head, a base pivotally attached to one of said tension links and having means for pivotally attaching it to the other tension links, and an operating force transmitting ring attached by a flexible member to one of the aforedescribed elements.

9. A chain tool including a head, a shaft threaded through said head, a thrust block attached to said threaded shaft, tension means pivotally attached to opposite sides of said head, and a base pivotally attached to one of said tension means and having means for pivotally attaching it to the other tension means, said block having pin guiding means formed thereon.

10. A chain tool including a head, a shaft thereon.

HAROLD C. MEDLEY. 

